Fluent speakers pause a lot
Speakers at the top band pause often. They pause to think, they say "um", they restart a sentence. Fluency has never meant an unbroken stream of speech.
We measure this directly. When we score a spoken answer, we measure how fast you speak, how long you run between pauses, how much of your answer is silence, and where each pause falls. Then we check those measurements against how human raters scored the same speech. The measurements agree with human judgement at about ρ = 0.8 — strong agreement (see how our scoring works).
And the clearest thing in that data is this: pause count is a weak signal. Pause placement is a strong one.
The one thing that matters: where you pause
Compare two speakers. Both pause for the same total time. Both say "um" the same number of times. One sounds fluent; one sounds like they are struggling. The difference is position.
| Where the pause falls | What it sounds like | Example |
|---|---|---|
| At a clause boundary — before and, but, because, so, or before a new sentence | Fluent. You finished a thought and are planning the next one. Normal at every band, including 8 and 9. | "I usually study at home … because the library is too far." |
| Mid-clause — after a, the, of, to, is, or in the middle of a phrase | Hesitant. You are searching for the word, and the listener hears the machinery stop. | "I usually study at the … um … the place near my house." |
A pause after "the" is a stall: the grammar has committed you to a noun and you cannot find it. A pause before "because" is a breath: you have finished one idea and are choosing the next. Listeners — and raters — hear those two silences completely differently, even when they are exactly the same length.
What frequent "um" is telling you
Filler sounds are not counted against you. Nobody tallies your "um"s, and we do not score them — filler detection is unreliable enough that we would not trust the count. A few fillers are normal; fluent speakers use them at every level. So they are not worth worrying about one by one.
A lot of them is worth paying attention to, though.
The band descriptors separate two kinds of hesitation. Near the top, hesitation is content-related — you are deciding what to say. Lower down, it is language-related — you are looking for the word. Frequent "um" in the middle of a sentence is usually the second kind. It is the same thing as the mid-phrase pause above, with a sound in it.
So treat it as information: it usually means your sentences are running ahead of the language you can produce.
But do not try to fix it by holding the sound back. If you do, the hesitation normally turns into silence instead, which is worse — or you spend part of your attention monitoring yourself, and hesitate more.
Work on the cause: shorter sentences, a slower pace, and something ready to say. Fillers drop off on their own once you are not searching for words.
What we actually measure
For transparency, here is roughly where the measurements sit. These are our numbers, not official test criteria — IELTS and TOEFL publish qualitative descriptors and no acoustic thresholds. We use these because they line up with human ratings; treat them as a mirror, not a rulebook.
| What we measure | Stronger | Weaker |
|---|---|---|
| Articulation rate — speed while actually speaking, ignoring pauses | about 2.8–3.3 words/sec | below ~1.5 words/sec |
| Length of run — how many words between pauses | 7+ words | under 4 words |
| Long pauses (½ second or more), per minute | 4 or fewer | more than 12 |
| Pause ratio — share of your answer that is silence | under 30% | over 45% |
How to move your pauses
The goal is not fewer pauses. It is pauses in better places. Four things do that:
- Slow down a little. Most mid-clause stalls happen because you started a sentence faster than you could finish it. A calmer pace means you commit to fewer phrases you cannot complete.
- Start smaller. Long, ambitious sentences are the main cause of stalling — you launch a structure and run out of language halfway. One clear idea per sentence gives you a finish line you can actually reach.
- Finish the phrase, then think. If you feel the search starting, push through to the end of the phrase you are in, and take the pause there. Same silence, completely different impression.
- Have somewhere to go. Most stalls are not language problems — they are idea problems. Add "because …" or "for example …" to every claim. It buys time and it raises your score, because giving reasons is itself part of what is marked.
If you want a general method for keeping a topic going for two minutes, see IELTS Speaking Part 2 and our guide to speaking fluency.
You cannot hear this in yourself
This is the hard part. While you are speaking, your attention is on the idea, so you do not hear your own hesitation — and afterwards you remember whether it felt smooth, which is not the same thing. Self-assessment of fluency is unreliable for almost everyone.
So measure it. Record a two-minute answer and listen back with one question only: did I stop in the middle of phrases, or between them? That single question will teach you more than any list of linking words.
Aflo does that measurement for you — it listens to your answer, measures your pauses and your speaking rate, and shows you where your fluency actually dropped, sentence by sentence.
For the test, and for real life
In the exam, the target is precise: get your hesitation out of the middle of your phrases. Nobody is counting your fillers, so do not waste attention on them directly — attack the word-searching that causes them.
Outside the exam, the calculation changes. In a job interview, a presentation, or a client meeting, a heavy "um" habit genuinely works against you — it reads as unprepared, whatever the rubric says. That is a real skill worth training, and it is trained the same way: not by biting the sound back, but by knowing your material well enough that you are never hunting for the next word. Books like Chris Anderson's TED Talks are good on this.
It is the same fix in both cases: work on the cause, and both problems get smaller.
Frequently asked questions
Do fillers like "um" lower my speaking score?
They are not counted against you directly — nobody tallies them, and a few are normal even at the top bands. But frequent fillers usually mean you are hesitating to find words rather than to choose an idea, and that difference is what the band descriptors separate. So it is worth noticing, even though the sound itself is not what is marked.
So should I try to stop saying "um"?
Not by suppressing the sound. If you clamp down on it, the hesitation usually turns into silence instead — which is worse — or you spend half your attention self-monitoring and stall even more. Reduce the cause instead: simpler sentences, a calmer pace, and a reason or example ready to say. The fillers fall away on their own when you are not hunting for words. For real-life speaking (interviews, presentations), a heavy filler habit does hurt you, and this is still the way to fix it.
Is pausing bad in IELTS Speaking?
Pausing is not bad. Where you pause is what matters. A pause at a clause boundary — before 'because', 'but', 'and', or a new sentence — sounds like planning and is normal at every band. A pause in the middle of a phrase, after 'the' or 'to', sounds like you are searching for a word, and that is what reads as hesitant.
Should I speak faster to sound more fluent?
No. Speed is not fluency. Around 2.5 words per second while you are actually speaking is perfectly fluent. Speaking too fast causes stumbles and restarts, which usually makes you sound less fluent, not more.
Are these numbers the official IELTS criteria?
No. IELTS and TOEFL publish qualitative band descriptors and no acoustic thresholds. The figures in this article are the measurements Aflo uses, which we validated against human ratings (about ρ = 0.8 agreement). Use them as a mirror on your own speech, not as an official rulebook.